An issue was discovered in the kernel in OpenBSD 6.6. The WEP, WPA, WPA2, and WPA3 implementations treat fragmented frames as full frames. An adversary can abuse this to inject arbitrary network packets, independent of the network configuration.
https://github.com/vanhoefm/fragattacks/blob/master/SUMMARY.md
http://www.openwall.com/lists/oss-security/2021/05/11/12
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-wifi-faf-22epcEWu
https://www.arista.com/en/support/advisories-notices/security-advisories/12602-security-advisory-63
Source: MITRE
Published: 2021-05-11
Updated: 2021-12-03
Type: CWE-74
Base Score: 2.6
Vector: AV:N/AC:H/Au:N/C:N/I:P/A:N
Impact Score: 2.9
Exploitability Score: 4.9
Severity: LOW
Base Score: 5.3
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:N
Impact Score: 3.6
Exploitability Score: 1.6
Severity: MEDIUM